Located within Frank G. Bonelli Regional Park in San Dimas, California, Puddingstone Reservoir is a 250-acre artificial lake with five miles of shoreline. The reservoir features a designated speed zone for powered watercraft operating from 10:00 AM until 30 minutes before sunset, while the remainder of the lake enforces a 12 mph speed limit with required counterclockwise travel.

A large launch area on the north shore provides ample parking with 180 trailer spaces, two boarding floats, and two carry-down walkways. The facility includes grass areas leading to the water and docks, though paddlers should note the docks are too high for easy launching. All non-motorized vessels must be over 8 feet in length.

Entry fees include $10 for vehicle entry and $7 for launching non-motorized craft. During winter weekdays (November through February), vehicle entry fees are waived. Kayaks and stand-up paddleboards can be rented starting at $12 per hour at the swim beach and east shore areas.

The lake hosts abundant wildlife, particularly birds, with over 250 documented species including Great Blue Heron, Double-crested Cormorant, and various waterfowl. However, paddlers should be aware that the California Office of Environmental Health has issued advisories about elevated mercury and PCB levels in fish.

Key safety considerations include wearing a Personal Flotation Device (PFD), which is strictly enforced by lifeguards. Paddlers should maintain distance from shoreline anglers and be mindful of motorized traffic in designated zones. The lake typically experiences less crowded conditions despite its urban location.

The reservoir provides well-maintained amenities including picnic grounds and restroom facilities. Power boats are restricted to a small section away from the main paddling and picnic areas, making it suitable for families and recreational paddlers. The lake's perimeter trail system offers scenic views for paddlers exploring the shoreline.